Unrivaled Tang Sect - Chapter 620.1: Flying Dagger

One day, I – a high schooler – found a paperback in the hospital. The “Disease Coexistence Journal” was its title. It was a diary that my classmate, Sakura Yamauchi, had written in secret. Inside, it was written that due to her pancreatic disease, her days were numbered. And thus, I coincidentally went from Just-a-Classmate to a Secret-Knowing-Classmate. It was as if I were being drawn to her, who was my polar opposite. However, the world presented the girl that was already suffering from an illness with an equally cruel reality…

The best-selling, award-winning debut work by Yoru Sumino:

“Bestsellers 2016 (Overall) by NIPPAN” – 4th Place

“Bestsellers 2016 (Paperback Fiction) by NIPPAN” – 1st Place

“Bestsellers 2016 (Overall) by TOHAN” – 5th Place

“Bestsellers 2016 (Literary Books) by TOHAN” – 1st Place

“Bookstore Grand Prix 2016” – 2nd Place

“DA VINCI BOOK OF THE YEAR 2015” – 2nd Place

“Bestsellers 2015 (Literary Books) by TOHAN” – 6th Place

As of May 2017, this book has sold over 1.2 million copies.

When necromancers perform a great ritual to summon an undead servant, they bring a powerful vampire into their world. And now, their fate is sealed as food, but for Klaus, this is just the beginning of his adventure. In a cruel world where people will do anything for power and immortality, he is already very strong and immortal, so what's left if not start a family and have fun stepping on arrogant people through the way?

As a man who had lived for 20 something years and had always considered himself as a straight man, he woke up one day and found himself possessed by a stupid and cute system. Moreover, it was a gong-shou cultivating system?! Let’s see how a shou with raised hackles evolves into a (pseudo)queen shou, incidentally with a story of a hidden loyal dog gong.

- Description from Novelupdates